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At 14.08 kg in size M, the Trek Fuel EX 9.9 X0 AXS Gen 7 is the lightest Fuel EX, thanks to careful choices: Line Pro 30 carbon wheels, a Race Face ERA carbon handlebar, a Trek Aeolus Pro saddle with carbon rails and a wireless Reverb AXS post. It keeps the OCLV Mountain carbon frame and 145 / 150 mm RockShox Ultimate suspension. Purple Phaze/Amethyst Marble pairs a deep purple with amethyst marbling.
| Frame | OCLV Mountain carbon, integrated storage, adjustable progression, threaded BSA 73, ISCG 05, UDH hanger, Boost |
| Suspension | RockShox Lyrik Ultimate Charger 3.1 RC 150 mm / Super Deluxe Ultimate RC2T 145 mm |
| Drivetrain | Wireless SRAM X0 Eagle AXS T-Type 1x12, 30T chainring, XS-1295 10-52 cassette, X0 Eagle chain |
| Brakes | SRAM Maven Silver hydraulic 4-piston, HS2 rotors 200 mm (front) and 180 mm (rear) |
| Wheels / tyres | Bontrager Line Pro 30 carbon / Maxxis Minion DHF (front) and DHR II (rear) 2.5, EXO+, Tubeless Ready |
| Cockpit | Race Face ERA carbon 800 mm handlebar, 27.5 mm rise, Race Face Turbine R 40 mm stem |
| Saddle / seatpost | Trek Aeolus Pro with carbon rails, 145 mm / wireless RockShox Reverb AXS, 150 to 200 mm depending on size |
| Weight | 14.08 kg in size M (Trek figure, with tubeless sealant) |
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At a glance
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For the mountain biker who wants to go fast everywhere, uphill and downhill, and appreciates a trail bike that stays lively when accelerating. It will also suit riders who ride for long hours and feel the difference of every gram over the course of a ride.
OCLV carbon, Trek's signature. Since 1992, Trek has cured its fibres under pressure for void-free frames. The Mountain version reinforces the areas hit by rocks and landings. Frameset: 3.31 kg (M), with lifetime warranty.
| OCLV Mountain (Fuel EX 9.8 / 9.9) | Alpha NEXT Platinum (Fuel EX 5 to 9) | Road OCLV (Madone, Domane) | |
| Level | MTB carbon, alloy frame rocker | Trek premium aluminium | Trek road carbon |
| Construction | OCLV reinforced in exposed areas | Hydroforming, smoothed welds | OCLV lightened to the maximum |
| Fuel EX frameset (M) | 3.31 kg | 4.95 kg | not applicable |
| What it means | Base of the lightest Fuel EX | 1.64 kg more on the frame | Not made for MTB impacts |
Put simply: same frame as the 9.8 models; the 1.20 kg saving over the 9.8 XT comes down to the kit.
The Trek Aeolus Pro saddle, with its AirLoom pattern and carbon rails, is a road saddle adapted for mountain biking: light and supportive, it suits long hours in the saddle. The 800 mm Race Face ERA carbon bar filters some of the vibration and eases the strain on your hands on rough tracks.
The Reverb AXS offers 150 to 200 mm of travel depending on size, with no cable: the remote can be mounted wherever you like on the bar. It lets you drop the saddle at the last moment before a descent, without ever having to pull a cable that stiffens over time.
| Model | Frame | Travel rear / front | Drivetrain | Weight (M) |
| Fuel EX 9.8 XT | OCLV Mountain carbon | 145 / 150 mm | Mechanical Shimano XT | 15.28 kg |
| Fuel EX 9.9 X0 AXS | OCLV Mountain carbon | 145 / 150 mm | Wireless SRAM X0 Eagle AXS | 14.08 kg |
| Top Fuel 9.8 XT Di2 | OCLV Mountain carbon | 120 / 130 mm | Wireless Shimano XT Di2 | 14.00 kg |
| Fuel LX 9.8 XT Di2 | OCLV Mountain carbon | 160 / 170 mm | Wireless Shimano XT Di2 | 15.97 kg |
Our take: the 9.9 X0 AXS is 1.20 kg lighter than the 9.8 XT, with the identical frame. The Top Fuel 9.8 XT Di2 weighs 14.00 kg but with 120 / 130 mm: less travel for almost the same weight.
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LVR sizing advice If you are between two sizes, the smaller favours handling on technical trails, the larger composure when the terrain speeds up. The Reverb AXS goes from 150 mm in S to 200 mm from L, and size S uses a 27.5-inch rear wheel.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| A road saddle on a mountain bike? | The Aeolus Pro comes in an MTB version; light, it supports the pelvis well on climbs. |
| Carbon bar and crashes? | It is designed for mountain biking; after a heavy crash, have it checked in the workshop. |
| Is the Reverb AXS reliable? | Yes, and with no cable, it stays smooth over time; we service it at maintenance. |
| Is the purple dark? | Deep in the shade, it reveals its amethyst veins in full light. |
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The LVR Cycles verdict A Fuel EX lightened right down to the details, from the carbon-railed saddle to the Line Pro 30 wheels. The amethyst marble purple gives it a rare elegance.
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Why buy from LVR Cycles? In Béziers, we fine-tune your riding position, set up the Reverb AXS and service the RockShox suspension on your Fuel EX.
Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.
Data sheet
Specific References